Exhaust on un-modified chamber was avg 5cfm less than TF flow chart. On modified chamber it ran 5-8 cfm more than advetised, as there is .06 more room on the shrouded side. Exh. port flows so good I will not change it at all. Exh. was 250cfm at .700". My old 587 cast iron heads couldn't muster 190 cfm, with a pipe and car ran 9.60s so I see no need to do anything to exh, except to put in a 1.60 8mm stem valve over the 1.57--11/32 valve supplied to save a little weight..
An interesting note, the TF ford 2.08 x 8mm intake valve weighs 109.5 grams, which is what I bought to put in the TF mopar head vs the as shipped 2.02 valve that weighs 123 grams. Bigger and lighter. Sure seems like a win--win scenario.